im bulding web app (sweepstakes), where user has to insert his data AND like one or maybe more facebook pages. Then he can continue and participate in sweepstakes. he cannot participate if he doesnt click on like button. So i have to know that user has clicked on the like button. How do i do it?
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Please refer similar post may be can help you out.
Facebook how to check if user has liked page and show content?
thanks.